whitney



(No-Model.) v I V R. W. WHITNEY;

RUPILING ATTACHMENT POE. SEWING MACHINES. 7 No. 516,252. Patented Mar.13, 1894.

6 W @ZWLVL parted to lever O and are regulated in a man- RUEL W.WHITNEY, OF OLEVELAND,

ATENT OFFICE.

OHIO, ASSIGNOR TO THE STANDARD SEWING MACHINE COMPANY, OF SAME PLACE.

RUFFLING ATTACHMENT FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 516,252, dated March13, 1894.

Application filed May 14, 1891. Serial No. 392,769- (No model.) I'

To aZZ whom it may concern.

Be it known that I, RUEL W. WHITNEY, of Cleveland, in the county ofOuyahoga and State of Ohio, have invented certain new andusefullmprovements in RuftlingAttaohments for Sewing-Machines; andI dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit pertains to make and use the same.

My invention relates to improvements in ruffling attachments forsewingmachines; and 1t consists in certain features of construction and incombination of parts hereinafter described and pointed out in the claim.

In the accompanying drawings Figure 1 is a viewin perspective of arufliingattachment embody-ing my invention. Figs. Zand 3 are,respectively, a side elevation and plan of the vibrating arm B, the planbeing somewhat enlarged. Fig. 4is an enlarged side elevation in detailof lever C.

A represents an angle-plate constituting the body of the device, theupright leg of the plate having a head aand this head having a slot afor attaching the device to the presserbar in the usual manner. Thevibrating arm B and the depending vibrating lever 0 have an axial screw19 in common, this screw ongaging a threaded hole in the opposingsection of the upright leg or plate A. Arm B at the free end thereof isforked or slotted as at B, the prongs whereof are supposed t) extendastride a set-screw, pin or other laterally projectingmember of theneedle-bar, by means of which the reciprocations of the needle-barimpart a vibrating movement to arm B. The vibrations of arm B arein turnimner hereinafter described. Lever O has a lateral pin 0' that operatesin a verticallyelongated ear cl, the latter being an attachment of theruffling-slide D. This slide has the usual teeth at D for engaging thework and the slide is provided with a longitudinal slot 01' in whichoperates a steady-pin a this pin connecting with plate Aand by means ofwhich the slide is held laterally.

For regulating the throw of the slide to make large or small ruffles Iprovide lever O with a notch 0 approximately V-shaped, the

walls whereof are alternately engaged by an abutment-screw E of arm B.It is evident that if the point of the screw engaged the bot tom of thenotch there would be no lost motion and lever G and the slide would insuch case have their maximum throw. By backing the screw so that therewill he more or less lost motion as between the point ofthe screw andthe walls of the notch the throw of lever O and the slide willbecorrespondingly reduced. If, in shortening the throw of the slide themovement were shortened alike at either end of the throw, in such casein making small ruffles the slide would not move the goods forward farenough to cause the needle to engage the ruffle or fold of the goods.The shortening of the throw of the slide must therefore be done mainlyon the rearward stroke thereof; although it is admissible to stitchnearer the edge of a short ruflie than of a long ruflie, and hence alimited amount of the shortening can, and should be done, on the forwardthrow of the slide. make the right hand wall of notch 0 sayapproximately radial with the axis of lever C while the left hand wallis more tangential as shown more clearly in Fig. 4.. Hence, in elevatingor depressing the screw the change in the throw of the lever is moreradical when the screw engages the tangential wall that gives the backstroke to the lever and slide; hence the shortening of the throw of theslide is mainly on the rearward stroke, the arrangement being such thatin making the shortest rufiie the needle will engage the forward end ofthe ruffle or fold of the goods.

The nut thatengages screwE is of the split variety shown and isconstructed by doubling back a section or finger b of arm B,aclamping-screw I) being provided for more or less closing the nut toclamp the screw. Screw E havingbeen adjusted as required bytighteningscrew b screw E is held rigidly to its adjustment.

' What I claim is- In a ruffling attachment for sewing machines, thecombination with' a plate, an arm pivoted thereto and adapted to bevibrated by the needle bar, a lever pivoted to said plate and providedwith a notch the said notch being approximately V-shaped, one side ofsaid I therefore notch beir ig approximately radial with the Intestimony whereof I sign this specificapivotal polnt 0f the lever andthe other tantion, in the presence of two witnesses, this 23d gentlal tosaid pivotal point, and a ruffling day of April, 1891.

slide actuated by said lever, of a screw car- RUEL \V. WHITNEY. 5 r1edby the arm, the free end of said screw Vitnesses:

resting 1n the notch in the lever, substan- C. H. DORER,

tially as set forth. WARD HOOVER.

